Equal-walled gerotor pump for wellbore applications
AssigneeSaudi Arabian Oil Company
InventorsRafael Adolfo Lastra Melo, Jinjiang Xiao
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Abstract
One example of a gerotor pump includes an inner rotor comprising multiple teeth, the inner rotor configured to rotate about a first longitudinal gerotor pump axis. The gerotor pump also includes a hollow outer rotor including an outer surface and an inner surface having substantially identical contours, the inner surface configured to engage with the multiple teeth and to rotate about a second longitudinal gerotor pump axis. The pump includes a pump housing within which the inner rotor and the outer rotor are disposed, wherein the outer surface of the outer rotor defines gaps between the pump housing and the outer rotor.
Claims13
A gerotor pump comprising:
- a first stage comprising:
- a first inner rotor comprising a first plurality of teeth, the first inner rotor configured to rotate about a first longitudinal gerotor pump axis;
- a first hollow outer rotor comprising first outer surface and first inner surface having substantially identical contours, the first inner surface configured to engage with the first plurality of teeth and to rotate about a second longitudinal gerotor pump axis;
- and
- a first pump housing within which the first inner rotor and the first outer rotor are disposed, wherein the first outer surface of the first outer rotor defines gaps between the first pump housing and the first outer rotor, wherein the gaps extend longitudinally along a length of the first pump housing from a downhole end of the first pump housing to an uphole end of the first pump housing;
- and
- a second stage in series with the first stage, the second stage comprising:
- a second inner rotor comprising a second plurality of teeth, the second inner rotor configured to rotate about a third longitudinal gerotor pump axis;
- a second hollow outer rotor comprising a second outer surface and a second inner surface having substantially identical contours, the second inner surface configured to engage with the second plurality of teeth and to rotate about a fourth longitudinal gerotor pump axis;
- and
- a second pump housing within which the second inner rotor and the second outer rotor are disposed, wherein the second outer surface of the second outer rotor defines gaps between the second pump housing and the second outer rotor, wherein the gaps extend longitudinally along a length of the second pump housing from a downhole end of the second pump housing to an uphole end of the second pump housing.
Dependencies are inferred from the claim text.